Fair Value of Financial Instruments (Tables)

12 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments on a Recurring Basis

The following table presents financial instruments, other than debt, that we measured at fair value on a recurring basis. See Note 13 of this Annual Report on Form 10-K for a discussion of our debt. In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest level input that is significant to the determination of the fair value.

	Level 1				Level 2				Level 3				Total Fair Value
	September 30,				September 30,				September 30,				September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
Assets:
Cash and cash equivalents	$	185,979	$	257,354	$	—	$	—	$	—	$	—	$	185,979	$	257,354
Other long-term investments	1,439		1,214		—		—		—		—		1,439		1,214
Derivative financial instruments	—		—		12,335		27		—		—		12,335		27
Total assets	$	187,418	$	258,568	$	12,335	$	27	$	—	$	—	$	199,753	$	258,595
Liabilities:
Derivative financial instruments	$	—	$	—	$	3,383	$	38,157	$	—	$	—	$	3,383	$	38,157
Total liabilities	$	—	$	—	$	3,383	$	38,157	$	—	$	—	$	3,383	$	38,157